4 digit palindromes must be of form abba, so being required that you use both numbers, you only have two: 1221 and 2112
The answer is A. If you substitute -2 and -8/3 for x, the answer is 0.
360 degrees in a circle
360 degrees minus 90 degrees (the right angle of the square) = 270 degrees
270 degrees divided by 2 = 135 degrees
f = 135 degrees
